Failure in conceptualschema

Just ran into this issue myself. The problem is caused (in my scenario) by the loopback check. the PBIRS proccess tries to call the conceptual Schema throught the portal API and is denied becuase its utilizing a custom host name in its request. I resovled the error by turning off loopback check on the PBIRS server so it allows the host name through

I used Method 2 in the article. Method 1 is recommended but Method 2 is good for verifying if it fixes it, then you can revert to method one to allow the specific host name you want.

https://support.microsoft.com/en-us/help/896861/you-receive-error-401-1-when-you-browse-a-web-site-that-uses-integrate

I’ve installed Power BI Report Server and registered the SPN’s with Delegation and the services runs with a domain account.. Last week everything works perfect – Live Query and Import PBIX Files. Since a few days it I got following errors. Now I can’t open any Power Bi Report- there are no data shown in the reports (import and live query)!

Can please anyone assist?

Event Log Windows / Application:

The description for Event ID 25 from source MSOLAP$PBIRS cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.

If the event originated on another computer, the display information had to be saved with the event.

The following information was included with the event:

msmdsrvi.rll

1031

I’ve done a repair of the installation, but nothing has changed.

RSPortal.Log
RSPortal!library!RSPortal.exe!33!12/06/2017-16:22:07:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.AccessDeniedException: , Microsoft.ReportingServices.Diagnostics.Utilities.AccessDeniedException: The permissions granted to user 'NT AUTHORITY\ANONYMOUS LOGON' are insufficient for performing this operation.;

RSPowerBI.log

2017-12-06 16:22:15.8262|ERROR|14|Failure in conceptualschema| RequestID = 00af6ee7-3974-9968-1067-bbc740dfacc5 ClientSessionID = 72f2d448-f979-09fa-5787-73cf3aa0d112 Microsoft.PowerBI.ReportServer.WebApi.Catalog.CatalogAccessException: Forbidden

   at Microsoft.PowerBI.ReportServer.WebApi.ASConnection.RSDataSourceProvider.GetDataSource(Int64 modelId)

   at Microsoft.PowerBI.ReportServer.ExploreHost.RSPowerViewHandler.CreateModelKeyFromId(String modelIdFromClient, String maxModelMetadataVersion)

   at Microsoft.PowerBI.ReportServer.ExploreHost.RSPowerViewHandler.EnsureSession(String modelId)

   at Microsoft.PowerBI.ExploreHost.ExploreClientHandlerBaseFlow.<RunAsync>b__8_0()

   at System.Threading.Tasks.Task.Execute()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Microsoft.PowerBI.ExploreHost.ExploreClient.<GetClientConceptualSchemaAsync>d__10.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Microsoft.PowerBI.ReportServer.ExploreHost.RSExploreHost.<GetConceptualSchemaAsync>d__3.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Microsoft.PowerBI.ReportServer.WebApi.PbiApi.PbiApiController.<GetConceptualSchemaAsync>d__1b.MoveNext()

I just experienced this issue and looking for a solution. Below. mhugh link to a article thats remove. 

Are you able to find this article somehow? 

Tnx!